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  #1  
Old 08-28-2021, 08:21 PM
LR60 LR60 is offline
 
Join Date: Jan 2011
Location: Trinity,NC
Posts: 46
Default Exhaust Leak

Both exhaust joints have some blow by, any suggestions on how to prevent this. The alignment during initial install was not great and now after 10 hours Iím seeing this..used nickel anti seize during install.
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  #2  
Old 08-29-2021, 06:21 AM
ShortSnorter ShortSnorter is offline
 
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Are those bolts too long - as in are the nuts out of thread to continue tightening?
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  #3  
Old 08-29-2021, 09:54 AM
LR60 LR60 is offline
 
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The correct hardware is installed. Instructions are to run the nuts down to the bottom of the threads. The springs set the determined tension on the clamps.

The mother ship suggested rotating the clamps and re clamping, which I tried but it did not help.

The second suggestion from vans was to apply a sealant. Iím curious if there is a better way to align the joints before trying high temp sealant.

Thanks
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  #4  
Old 08-29-2021, 10:31 AM
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Walt Walt is offline
 
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The ball joints should not leak like that, I would take them apart and see what's going on.
Leaking exhaust is a serious problem, if you don't have a CO detector you should probably install one.
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EXP Aircraft Services LLC
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  #5  
Old 08-29-2021, 01:36 PM
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Walt Walt is offline
 
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A Recommendation from Vetterman (the 'man'):

"my summation is the the springs are too light or not strong enough because as they heat up they lose tension and a separation is likely the cause unless there is a deformation of the ball joint. I suggest the the guy call Clint and get the proper springs and bolts even though itís not his system. Just my input."
Larry Vetterman
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Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 2000+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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  #6  
Old 08-29-2021, 05:31 PM
LR60 LR60 is offline
 
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Location: Trinity,NC
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Thanks for the advice Walt.

I do have an GD-40 CO detector installed.

Iím gonna drop the tailpipe and see if I can improve the alignment and play around with the spring tensions per your advice.

Thanks again
Mark
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  #7  
Old 08-30-2021, 06:27 AM
BillL BillL is offline
 
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Location: Central IL
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A friend had this same issue on his 14A and got a new exhaust system from Vans (no more leaks), it was a production problem for his - you should properly investigate and make contact.
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  #8  
Old 08-30-2021, 03:55 PM
LR60 LR60 is offline
 
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Location: Trinity,NC
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Thanks Bill for that information.

I took it all apart to day, cleaned it up and reapplied antiseize. Also added one extra washer on the bolts to possibly increase the clamp up pressure. Not sure itís gonna make much difference.

Gonna fly and monitor before reaching out to Vans again.

Mark
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  #9  
Old 08-31-2021, 12:43 AM
A1AVIATON47 A1AVIATON47 is offline
 
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Location: DEWEY AZ
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Default BOLTS

BOLTS TO LONG, GET SHORTER ONES.
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